323235
Reaction of which among the following ethers with \(\mathrm{HI}\) in cold leads to the formation of methyl alcohol?
1 Ethyl methyl ether
2 Methyl propyl ether
3 Isopropyl methyl ether
4 tert-butyl methyl ether
Explanation:
When asymmetrical ether undergoes reaction with \(\mathrm{HI}\) in cold, bulkier group forms its iodide and smaller group forms its alcohol, whereas if normal alkyl group present in ether, smaller group forms its iodide.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323236
Phenyl methyl ether (anisole) reacts with \(\mathrm{HI}\) to give phenol and methyl iodide but not iodobenzene and methyl alcohol because
1 \({{\text{I}}^{\text{ - }}}\) attacks the methyl group as \(\mathrm{C}\) - O bond between phenyl and oxygen is formed by \({\text{s}}{{\text{p}}^{\text{2}}}\) hybridised carbon, thus difficult to break
2 \({{\text{I}}^{\text{ - }}}\) ion is not reactive towards benzene
3 phenol is formed as a result of hydrolysis of iodobenzene
4 methyl alcohol formed during reaction, reacts with \({{\text{I}}^{\text{ - }}}\) to form methyl iodide.
Explanation:
Due to resonance stabilisation of -C-O- bond in phenol.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323237
Isopropyl methyl ether when treated with cold hydrogen iodide gives
1 isopropyl iodide and methyl iodide
2 isopropyl alcohol and methyl iodide
3 isopropyl alcohol and methyl alcohol
4 isopropyl iodide and methyl alcohol
Explanation:
Isopropyl methyl ether when treated with cold hydrogen iodide gives isopropyl alcohol and methyl iodide. In case of asymmetrical ethers, the alkyl halide is always formed from the smaller alkyl group.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323238
What will be the products of reaction if methoxy benzene reacts with HI?
1 Methyl alcohol (methanol) + iodobenzene
2 Methyl iodide (iodomethane) + benzene
3 Methyl iodide + phenol
4 Methyl iodide + iodobenzene
Explanation:
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323239
Ethoxy benzene on reaction with hot and concentrated \(\mathrm{HI}\) forms
1 Ethyl iodide and phenol
2 Ethyl iodide and iodobenzene
3 Ethyl alcohol and iodobenzene
4 Ethyl alcohol and phenol
Explanation:
\(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{O}\) bond is not cleaved due to resonance (double bond character).
323235
Reaction of which among the following ethers with \(\mathrm{HI}\) in cold leads to the formation of methyl alcohol?
1 Ethyl methyl ether
2 Methyl propyl ether
3 Isopropyl methyl ether
4 tert-butyl methyl ether
Explanation:
When asymmetrical ether undergoes reaction with \(\mathrm{HI}\) in cold, bulkier group forms its iodide and smaller group forms its alcohol, whereas if normal alkyl group present in ether, smaller group forms its iodide.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323236
Phenyl methyl ether (anisole) reacts with \(\mathrm{HI}\) to give phenol and methyl iodide but not iodobenzene and methyl alcohol because
1 \({{\text{I}}^{\text{ - }}}\) attacks the methyl group as \(\mathrm{C}\) - O bond between phenyl and oxygen is formed by \({\text{s}}{{\text{p}}^{\text{2}}}\) hybridised carbon, thus difficult to break
2 \({{\text{I}}^{\text{ - }}}\) ion is not reactive towards benzene
3 phenol is formed as a result of hydrolysis of iodobenzene
4 methyl alcohol formed during reaction, reacts with \({{\text{I}}^{\text{ - }}}\) to form methyl iodide.
Explanation:
Due to resonance stabilisation of -C-O- bond in phenol.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323237
Isopropyl methyl ether when treated with cold hydrogen iodide gives
1 isopropyl iodide and methyl iodide
2 isopropyl alcohol and methyl iodide
3 isopropyl alcohol and methyl alcohol
4 isopropyl iodide and methyl alcohol
Explanation:
Isopropyl methyl ether when treated with cold hydrogen iodide gives isopropyl alcohol and methyl iodide. In case of asymmetrical ethers, the alkyl halide is always formed from the smaller alkyl group.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323238
What will be the products of reaction if methoxy benzene reacts with HI?
1 Methyl alcohol (methanol) + iodobenzene
2 Methyl iodide (iodomethane) + benzene
3 Methyl iodide + phenol
4 Methyl iodide + iodobenzene
Explanation:
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323239
Ethoxy benzene on reaction with hot and concentrated \(\mathrm{HI}\) forms
1 Ethyl iodide and phenol
2 Ethyl iodide and iodobenzene
3 Ethyl alcohol and iodobenzene
4 Ethyl alcohol and phenol
Explanation:
\(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{O}\) bond is not cleaved due to resonance (double bond character).
323235
Reaction of which among the following ethers with \(\mathrm{HI}\) in cold leads to the formation of methyl alcohol?
1 Ethyl methyl ether
2 Methyl propyl ether
3 Isopropyl methyl ether
4 tert-butyl methyl ether
Explanation:
When asymmetrical ether undergoes reaction with \(\mathrm{HI}\) in cold, bulkier group forms its iodide and smaller group forms its alcohol, whereas if normal alkyl group present in ether, smaller group forms its iodide.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323236
Phenyl methyl ether (anisole) reacts with \(\mathrm{HI}\) to give phenol and methyl iodide but not iodobenzene and methyl alcohol because
1 \({{\text{I}}^{\text{ - }}}\) attacks the methyl group as \(\mathrm{C}\) - O bond between phenyl and oxygen is formed by \({\text{s}}{{\text{p}}^{\text{2}}}\) hybridised carbon, thus difficult to break
2 \({{\text{I}}^{\text{ - }}}\) ion is not reactive towards benzene
3 phenol is formed as a result of hydrolysis of iodobenzene
4 methyl alcohol formed during reaction, reacts with \({{\text{I}}^{\text{ - }}}\) to form methyl iodide.
Explanation:
Due to resonance stabilisation of -C-O- bond in phenol.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323237
Isopropyl methyl ether when treated with cold hydrogen iodide gives
1 isopropyl iodide and methyl iodide
2 isopropyl alcohol and methyl iodide
3 isopropyl alcohol and methyl alcohol
4 isopropyl iodide and methyl alcohol
Explanation:
Isopropyl methyl ether when treated with cold hydrogen iodide gives isopropyl alcohol and methyl iodide. In case of asymmetrical ethers, the alkyl halide is always formed from the smaller alkyl group.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323238
What will be the products of reaction if methoxy benzene reacts with HI?
1 Methyl alcohol (methanol) + iodobenzene
2 Methyl iodide (iodomethane) + benzene
3 Methyl iodide + phenol
4 Methyl iodide + iodobenzene
Explanation:
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323239
Ethoxy benzene on reaction with hot and concentrated \(\mathrm{HI}\) forms
1 Ethyl iodide and phenol
2 Ethyl iodide and iodobenzene
3 Ethyl alcohol and iodobenzene
4 Ethyl alcohol and phenol
Explanation:
\(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{O}\) bond is not cleaved due to resonance (double bond character).
323235
Reaction of which among the following ethers with \(\mathrm{HI}\) in cold leads to the formation of methyl alcohol?
1 Ethyl methyl ether
2 Methyl propyl ether
3 Isopropyl methyl ether
4 tert-butyl methyl ether
Explanation:
When asymmetrical ether undergoes reaction with \(\mathrm{HI}\) in cold, bulkier group forms its iodide and smaller group forms its alcohol, whereas if normal alkyl group present in ether, smaller group forms its iodide.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323236
Phenyl methyl ether (anisole) reacts with \(\mathrm{HI}\) to give phenol and methyl iodide but not iodobenzene and methyl alcohol because
1 \({{\text{I}}^{\text{ - }}}\) attacks the methyl group as \(\mathrm{C}\) - O bond between phenyl and oxygen is formed by \({\text{s}}{{\text{p}}^{\text{2}}}\) hybridised carbon, thus difficult to break
2 \({{\text{I}}^{\text{ - }}}\) ion is not reactive towards benzene
3 phenol is formed as a result of hydrolysis of iodobenzene
4 methyl alcohol formed during reaction, reacts with \({{\text{I}}^{\text{ - }}}\) to form methyl iodide.
Explanation:
Due to resonance stabilisation of -C-O- bond in phenol.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323237
Isopropyl methyl ether when treated with cold hydrogen iodide gives
1 isopropyl iodide and methyl iodide
2 isopropyl alcohol and methyl iodide
3 isopropyl alcohol and methyl alcohol
4 isopropyl iodide and methyl alcohol
Explanation:
Isopropyl methyl ether when treated with cold hydrogen iodide gives isopropyl alcohol and methyl iodide. In case of asymmetrical ethers, the alkyl halide is always formed from the smaller alkyl group.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323238
What will be the products of reaction if methoxy benzene reacts with HI?
1 Methyl alcohol (methanol) + iodobenzene
2 Methyl iodide (iodomethane) + benzene
3 Methyl iodide + phenol
4 Methyl iodide + iodobenzene
Explanation:
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323239
Ethoxy benzene on reaction with hot and concentrated \(\mathrm{HI}\) forms
1 Ethyl iodide and phenol
2 Ethyl iodide and iodobenzene
3 Ethyl alcohol and iodobenzene
4 Ethyl alcohol and phenol
Explanation:
\(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{O}\) bond is not cleaved due to resonance (double bond character).
323235
Reaction of which among the following ethers with \(\mathrm{HI}\) in cold leads to the formation of methyl alcohol?
1 Ethyl methyl ether
2 Methyl propyl ether
3 Isopropyl methyl ether
4 tert-butyl methyl ether
Explanation:
When asymmetrical ether undergoes reaction with \(\mathrm{HI}\) in cold, bulkier group forms its iodide and smaller group forms its alcohol, whereas if normal alkyl group present in ether, smaller group forms its iodide.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323236
Phenyl methyl ether (anisole) reacts with \(\mathrm{HI}\) to give phenol and methyl iodide but not iodobenzene and methyl alcohol because
1 \({{\text{I}}^{\text{ - }}}\) attacks the methyl group as \(\mathrm{C}\) - O bond between phenyl and oxygen is formed by \({\text{s}}{{\text{p}}^{\text{2}}}\) hybridised carbon, thus difficult to break
2 \({{\text{I}}^{\text{ - }}}\) ion is not reactive towards benzene
3 phenol is formed as a result of hydrolysis of iodobenzene
4 methyl alcohol formed during reaction, reacts with \({{\text{I}}^{\text{ - }}}\) to form methyl iodide.
Explanation:
Due to resonance stabilisation of -C-O- bond in phenol.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323237
Isopropyl methyl ether when treated with cold hydrogen iodide gives
1 isopropyl iodide and methyl iodide
2 isopropyl alcohol and methyl iodide
3 isopropyl alcohol and methyl alcohol
4 isopropyl iodide and methyl alcohol
Explanation:
Isopropyl methyl ether when treated with cold hydrogen iodide gives isopropyl alcohol and methyl iodide. In case of asymmetrical ethers, the alkyl halide is always formed from the smaller alkyl group.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323238
What will be the products of reaction if methoxy benzene reacts with HI?
1 Methyl alcohol (methanol) + iodobenzene
2 Methyl iodide (iodomethane) + benzene
3 Methyl iodide + phenol
4 Methyl iodide + iodobenzene
Explanation:
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323239
Ethoxy benzene on reaction with hot and concentrated \(\mathrm{HI}\) forms
1 Ethyl iodide and phenol
2 Ethyl iodide and iodobenzene
3 Ethyl alcohol and iodobenzene
4 Ethyl alcohol and phenol
Explanation:
\(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{O}\) bond is not cleaved due to resonance (double bond character).
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